Root/drivers/bcma/scan.c

1/*
2 * Broadcom specific AMBA
3 * Bus scanning
4 *
5 * Licensed under the GNU/GPL. See COPYING for details.
6 */
7
8#include "scan.h"
9#include "bcma_private.h"
10
11#include <linux/bcma/bcma.h>
12#include <linux/bcma/bcma_regs.h>
13#include <linux/pci.h>
14#include <linux/io.h>
15#include <linux/dma-mapping.h>
16#include <linux/slab.h>
17
18struct bcma_device_id_name {
19    u16 id;
20    const char *name;
21};
22
23static const struct bcma_device_id_name bcma_arm_device_names[] = {
24    { BCMA_CORE_4706_MAC_GBIT_COMMON, "BCM4706 GBit MAC Common" },
25    { BCMA_CORE_ARM_1176, "ARM 1176" },
26    { BCMA_CORE_ARM_7TDMI, "ARM 7TDMI" },
27    { BCMA_CORE_ARM_CM3, "ARM CM3" },
28};
29
30static const struct bcma_device_id_name bcma_bcm_device_names[] = {
31    { BCMA_CORE_OOB_ROUTER, "OOB Router" },
32    { BCMA_CORE_4706_CHIPCOMMON, "BCM4706 ChipCommon" },
33    { BCMA_CORE_4706_SOC_RAM, "BCM4706 SOC RAM" },
34    { BCMA_CORE_4706_MAC_GBIT, "BCM4706 GBit MAC" },
35    { BCMA_CORE_AMEMC, "AMEMC (DDR)" },
36    { BCMA_CORE_ALTA, "ALTA (I2S)" },
37    { BCMA_CORE_INVALID, "Invalid" },
38    { BCMA_CORE_CHIPCOMMON, "ChipCommon" },
39    { BCMA_CORE_ILINE20, "ILine 20" },
40    { BCMA_CORE_SRAM, "SRAM" },
41    { BCMA_CORE_SDRAM, "SDRAM" },
42    { BCMA_CORE_PCI, "PCI" },
43    { BCMA_CORE_ETHERNET, "Fast Ethernet" },
44    { BCMA_CORE_V90, "V90" },
45    { BCMA_CORE_USB11_HOSTDEV, "USB 1.1 Hostdev" },
46    { BCMA_CORE_ADSL, "ADSL" },
47    { BCMA_CORE_ILINE100, "ILine 100" },
48    { BCMA_CORE_IPSEC, "IPSEC" },
49    { BCMA_CORE_UTOPIA, "UTOPIA" },
50    { BCMA_CORE_PCMCIA, "PCMCIA" },
51    { BCMA_CORE_INTERNAL_MEM, "Internal Memory" },
52    { BCMA_CORE_MEMC_SDRAM, "MEMC SDRAM" },
53    { BCMA_CORE_OFDM, "OFDM" },
54    { BCMA_CORE_EXTIF, "EXTIF" },
55    { BCMA_CORE_80211, "IEEE 802.11" },
56    { BCMA_CORE_PHY_A, "PHY A" },
57    { BCMA_CORE_PHY_B, "PHY B" },
58    { BCMA_CORE_PHY_G, "PHY G" },
59    { BCMA_CORE_USB11_HOST, "USB 1.1 Host" },
60    { BCMA_CORE_USB11_DEV, "USB 1.1 Device" },
61    { BCMA_CORE_USB20_HOST, "USB 2.0 Host" },
62    { BCMA_CORE_USB20_DEV, "USB 2.0 Device" },
63    { BCMA_CORE_SDIO_HOST, "SDIO Host" },
64    { BCMA_CORE_ROBOSWITCH, "Roboswitch" },
65    { BCMA_CORE_PARA_ATA, "PATA" },
66    { BCMA_CORE_SATA_XORDMA, "SATA XOR-DMA" },
67    { BCMA_CORE_ETHERNET_GBIT, "GBit Ethernet" },
68    { BCMA_CORE_PCIE, "PCIe" },
69    { BCMA_CORE_PHY_N, "PHY N" },
70    { BCMA_CORE_SRAM_CTL, "SRAM Controller" },
71    { BCMA_CORE_MINI_MACPHY, "Mini MACPHY" },
72    { BCMA_CORE_PHY_LP, "PHY LP" },
73    { BCMA_CORE_PMU, "PMU" },
74    { BCMA_CORE_PHY_SSN, "PHY SSN" },
75    { BCMA_CORE_SDIO_DEV, "SDIO Device" },
76    { BCMA_CORE_PHY_HT, "PHY HT" },
77    { BCMA_CORE_MAC_GBIT, "GBit MAC" },
78    { BCMA_CORE_DDR12_MEM_CTL, "DDR1/DDR2 Memory Controller" },
79    { BCMA_CORE_PCIE_RC, "PCIe Root Complex" },
80    { BCMA_CORE_OCP_OCP_BRIDGE, "OCP to OCP Bridge" },
81    { BCMA_CORE_SHARED_COMMON, "Common Shared" },
82    { BCMA_CORE_OCP_AHB_BRIDGE, "OCP to AHB Bridge" },
83    { BCMA_CORE_SPI_HOST, "SPI Host" },
84    { BCMA_CORE_I2S, "I2S" },
85    { BCMA_CORE_SDR_DDR1_MEM_CTL, "SDR/DDR1 Memory Controller" },
86    { BCMA_CORE_SHIM, "SHIM" },
87    { BCMA_CORE_DEFAULT, "Default" },
88};
89
90static const struct bcma_device_id_name bcma_mips_device_names[] = {
91    { BCMA_CORE_MIPS, "MIPS" },
92    { BCMA_CORE_MIPS_3302, "MIPS 3302" },
93    { BCMA_CORE_MIPS_74K, "MIPS 74K" },
94};
95
96static const char *bcma_device_name(const struct bcma_device_id *id)
97{
98    const struct bcma_device_id_name *names;
99    int size, i;
100
101    /* search manufacturer specific names */
102    switch (id->manuf) {
103    case BCMA_MANUF_ARM:
104        names = bcma_arm_device_names;
105        size = ARRAY_SIZE(bcma_arm_device_names);
106        break;
107    case BCMA_MANUF_BCM:
108        names = bcma_bcm_device_names;
109        size = ARRAY_SIZE(bcma_bcm_device_names);
110        break;
111    case BCMA_MANUF_MIPS:
112        names = bcma_mips_device_names;
113        size = ARRAY_SIZE(bcma_mips_device_names);
114        break;
115    default:
116        return "UNKNOWN";
117    }
118
119    for (i = 0; i < size; i++) {
120        if (names[i].id == id->id)
121            return names[i].name;
122    }
123
124    return "UNKNOWN";
125}
126
127static u32 bcma_scan_read32(struct bcma_bus *bus, u8 current_coreidx,
128               u16 offset)
129{
130    return readl(bus->mmio + offset);
131}
132
133static void bcma_scan_switch_core(struct bcma_bus *bus, u32 addr)
134{
135    if (bus->hosttype == BCMA_HOSTTYPE_PCI)
136        pci_write_config_dword(bus->host_pci, BCMA_PCI_BAR0_WIN,
137                       addr);
138}
139
140static u32 bcma_erom_get_ent(struct bcma_bus *bus, u32 **eromptr)
141{
142    u32 ent = readl(*eromptr);
143    (*eromptr)++;
144    return ent;
145}
146
147static void bcma_erom_push_ent(u32 **eromptr)
148{
149    (*eromptr)--;
150}
151
152static s32 bcma_erom_get_ci(struct bcma_bus *bus, u32 **eromptr)
153{
154    u32 ent = bcma_erom_get_ent(bus, eromptr);
155    if (!(ent & SCAN_ER_VALID))
156        return -ENOENT;
157    if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_CI)
158        return -ENOENT;
159    return ent;
160}
161
162static bool bcma_erom_is_end(struct bcma_bus *bus, u32 **eromptr)
163{
164    u32 ent = bcma_erom_get_ent(bus, eromptr);
165    bcma_erom_push_ent(eromptr);
166    return (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID));
167}
168
169static bool bcma_erom_is_bridge(struct bcma_bus *bus, u32 **eromptr)
170{
171    u32 ent = bcma_erom_get_ent(bus, eromptr);
172    bcma_erom_push_ent(eromptr);
173    return (((ent & SCAN_ER_VALID)) &&
174        ((ent & SCAN_ER_TAGX) == SCAN_ER_TAG_ADDR) &&
175        ((ent & SCAN_ADDR_TYPE) == SCAN_ADDR_TYPE_BRIDGE));
176}
177
178static void bcma_erom_skip_component(struct bcma_bus *bus, u32 **eromptr)
179{
180    u32 ent;
181    while (1) {
182        ent = bcma_erom_get_ent(bus, eromptr);
183        if ((ent & SCAN_ER_VALID) &&
184            ((ent & SCAN_ER_TAG) == SCAN_ER_TAG_CI))
185            break;
186        if (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID))
187            break;
188    }
189    bcma_erom_push_ent(eromptr);
190}
191
192static s32 bcma_erom_get_mst_port(struct bcma_bus *bus, u32 **eromptr)
193{
194    u32 ent = bcma_erom_get_ent(bus, eromptr);
195    if (!(ent & SCAN_ER_VALID))
196        return -ENOENT;
197    if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_MP)
198        return -ENOENT;
199    return ent;
200}
201
202static s32 bcma_erom_get_addr_desc(struct bcma_bus *bus, u32 **eromptr,
203                  u32 type, u8 port)
204{
205    u32 addrl, addrh, sizel, sizeh = 0;
206    u32 size;
207
208    u32 ent = bcma_erom_get_ent(bus, eromptr);
209    if ((!(ent & SCAN_ER_VALID)) ||
210        ((ent & SCAN_ER_TAGX) != SCAN_ER_TAG_ADDR) ||
211        ((ent & SCAN_ADDR_TYPE) != type) ||
212        (((ent & SCAN_ADDR_PORT) >> SCAN_ADDR_PORT_SHIFT) != port)) {
213        bcma_erom_push_ent(eromptr);
214        return -EINVAL;
215    }
216
217    addrl = ent & SCAN_ADDR_ADDR;
218    if (ent & SCAN_ADDR_AG32)
219        addrh = bcma_erom_get_ent(bus, eromptr);
220    else
221        addrh = 0;
222
223    if ((ent & SCAN_ADDR_SZ) == SCAN_ADDR_SZ_SZD) {
224        size = bcma_erom_get_ent(bus, eromptr);
225        sizel = size & SCAN_SIZE_SZ;
226        if (size & SCAN_SIZE_SG32)
227            sizeh = bcma_erom_get_ent(bus, eromptr);
228    } else
229        sizel = SCAN_ADDR_SZ_BASE <<
230                ((ent & SCAN_ADDR_SZ) >> SCAN_ADDR_SZ_SHIFT);
231
232    return addrl;
233}
234
235static struct bcma_device *bcma_find_core_by_index(struct bcma_bus *bus,
236                           u16 index)
237{
238    struct bcma_device *core;
239
240    list_for_each_entry(core, &bus->cores, list) {
241        if (core->core_index == index)
242            return core;
243    }
244    return NULL;
245}
246
247static struct bcma_device *bcma_find_core_reverse(struct bcma_bus *bus, u16 coreid)
248{
249    struct bcma_device *core;
250
251    list_for_each_entry_reverse(core, &bus->cores, list) {
252        if (core->id.id == coreid)
253            return core;
254    }
255    return NULL;
256}
257
258static int bcma_get_next_core(struct bcma_bus *bus, u32 __iomem **eromptr,
259                  struct bcma_device_id *match, int core_num,
260                  struct bcma_device *core)
261{
262    s32 tmp;
263    u8 i, j;
264    s32 cia, cib;
265    u8 ports[2], wrappers[2];
266
267    /* get CIs */
268    cia = bcma_erom_get_ci(bus, eromptr);
269    if (cia < 0) {
270        bcma_erom_push_ent(eromptr);
271        if (bcma_erom_is_end(bus, eromptr))
272            return -ESPIPE;
273        return -EILSEQ;
274    }
275    cib = bcma_erom_get_ci(bus, eromptr);
276    if (cib < 0)
277        return -EILSEQ;
278
279    /* parse CIs */
280    core->id.class = (cia & SCAN_CIA_CLASS) >> SCAN_CIA_CLASS_SHIFT;
281    core->id.id = (cia & SCAN_CIA_ID) >> SCAN_CIA_ID_SHIFT;
282    core->id.manuf = (cia & SCAN_CIA_MANUF) >> SCAN_CIA_MANUF_SHIFT;
283    ports[0] = (cib & SCAN_CIB_NMP) >> SCAN_CIB_NMP_SHIFT;
284    ports[1] = (cib & SCAN_CIB_NSP) >> SCAN_CIB_NSP_SHIFT;
285    wrappers[0] = (cib & SCAN_CIB_NMW) >> SCAN_CIB_NMW_SHIFT;
286    wrappers[1] = (cib & SCAN_CIB_NSW) >> SCAN_CIB_NSW_SHIFT;
287    core->id.rev = (cib & SCAN_CIB_REV) >> SCAN_CIB_REV_SHIFT;
288
289    if (((core->id.manuf == BCMA_MANUF_ARM) &&
290         (core->id.id == 0xFFF)) ||
291        (ports[1] == 0)) {
292        bcma_erom_skip_component(bus, eromptr);
293        return -ENXIO;
294    }
295
296    /* check if component is a core at all */
297    if (wrappers[0] + wrappers[1] == 0) {
298        /* Some specific cores don't need wrappers */
299        switch (core->id.id) {
300        case BCMA_CORE_4706_MAC_GBIT_COMMON:
301        /* Not used yet: case BCMA_CORE_OOB_ROUTER: */
302            break;
303        default:
304            bcma_erom_skip_component(bus, eromptr);
305            return -ENXIO;
306        }
307    }
308
309    if (bcma_erom_is_bridge(bus, eromptr)) {
310        bcma_erom_skip_component(bus, eromptr);
311        return -ENXIO;
312    }
313
314    if (bcma_find_core_by_index(bus, core_num)) {
315        bcma_erom_skip_component(bus, eromptr);
316        return -ENODEV;
317    }
318
319    if (match && ((match->manuf != BCMA_ANY_MANUF &&
320          match->manuf != core->id.manuf) ||
321         (match->id != BCMA_ANY_ID && match->id != core->id.id) ||
322         (match->rev != BCMA_ANY_REV && match->rev != core->id.rev) ||
323         (match->class != BCMA_ANY_CLASS && match->class != core->id.class)
324        )) {
325        bcma_erom_skip_component(bus, eromptr);
326        return -ENODEV;
327    }
328
329    /* get & parse master ports */
330    for (i = 0; i < ports[0]; i++) {
331        s32 mst_port_d = bcma_erom_get_mst_port(bus, eromptr);
332        if (mst_port_d < 0)
333            return -EILSEQ;
334    }
335
336    /* First Slave Address Descriptor should be port 0:
337     * the main register space for the core
338     */
339    tmp = bcma_erom_get_addr_desc(bus, eromptr, SCAN_ADDR_TYPE_SLAVE, 0);
340    if (tmp <= 0) {
341        /* Try again to see if it is a bridge */
342        tmp = bcma_erom_get_addr_desc(bus, eromptr,
343                          SCAN_ADDR_TYPE_BRIDGE, 0);
344        if (tmp <= 0) {
345            return -EILSEQ;
346        } else {
347            bcma_info(bus, "Bridge found\n");
348            return -ENXIO;
349        }
350    }
351    core->addr = tmp;
352
353    /* get & parse slave ports */
354    for (i = 0; i < ports[1]; i++) {
355        for (j = 0; ; j++) {
356            tmp = bcma_erom_get_addr_desc(bus, eromptr,
357                SCAN_ADDR_TYPE_SLAVE, i);
358            if (tmp < 0) {
359                /* no more entries for port _i_ */
360                /* pr_debug("erom: slave port %d "
361                 * "has %d descriptors\n", i, j); */
362                break;
363            } else {
364                if (i == 0 && j == 0)
365                    core->addr1 = tmp;
366            }
367        }
368    }
369
370    /* get & parse master wrappers */
371    for (i = 0; i < wrappers[0]; i++) {
372        for (j = 0; ; j++) {
373            tmp = bcma_erom_get_addr_desc(bus, eromptr,
374                SCAN_ADDR_TYPE_MWRAP, i);
375            if (tmp < 0) {
376                /* no more entries for port _i_ */
377                /* pr_debug("erom: master wrapper %d "
378                 * "has %d descriptors\n", i, j); */
379                break;
380            } else {
381                if (i == 0 && j == 0)
382                    core->wrap = tmp;
383            }
384        }
385    }
386
387    /* get & parse slave wrappers */
388    for (i = 0; i < wrappers[1]; i++) {
389        u8 hack = (ports[1] == 1) ? 0 : 1;
390        for (j = 0; ; j++) {
391            tmp = bcma_erom_get_addr_desc(bus, eromptr,
392                SCAN_ADDR_TYPE_SWRAP, i + hack);
393            if (tmp < 0) {
394                /* no more entries for port _i_ */
395                /* pr_debug("erom: master wrapper %d "
396                 * has %d descriptors\n", i, j); */
397                break;
398            } else {
399                if (wrappers[0] == 0 && !i && !j)
400                    core->wrap = tmp;
401            }
402        }
403    }
404    if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
405        core->io_addr = ioremap_nocache(core->addr, BCMA_CORE_SIZE);
406        if (!core->io_addr)
407            return -ENOMEM;
408        core->io_wrap = ioremap_nocache(core->wrap, BCMA_CORE_SIZE);
409        if (!core->io_wrap) {
410            iounmap(core->io_addr);
411            return -ENOMEM;
412        }
413    }
414    return 0;
415}
416
417void bcma_init_bus(struct bcma_bus *bus)
418{
419    s32 tmp;
420    struct bcma_chipinfo *chipinfo = &(bus->chipinfo);
421
422    if (bus->init_done)
423        return;
424
425    INIT_LIST_HEAD(&bus->cores);
426    bus->nr_cores = 0;
427
428    bcma_scan_switch_core(bus, BCMA_ADDR_BASE);
429
430    tmp = bcma_scan_read32(bus, 0, BCMA_CC_ID);
431    chipinfo->id = (tmp & BCMA_CC_ID_ID) >> BCMA_CC_ID_ID_SHIFT;
432    chipinfo->rev = (tmp & BCMA_CC_ID_REV) >> BCMA_CC_ID_REV_SHIFT;
433    chipinfo->pkg = (tmp & BCMA_CC_ID_PKG) >> BCMA_CC_ID_PKG_SHIFT;
434    bcma_info(bus, "Found chip with id 0x%04X, rev 0x%02X and package 0x%02X\n",
435          chipinfo->id, chipinfo->rev, chipinfo->pkg);
436
437    bus->init_done = true;
438}
439
440int bcma_bus_scan(struct bcma_bus *bus)
441{
442    u32 erombase;
443    u32 __iomem *eromptr, *eromend;
444
445    int err, core_num = 0;
446
447    bcma_init_bus(bus);
448
449    erombase = bcma_scan_read32(bus, 0, BCMA_CC_EROM);
450    if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
451        eromptr = ioremap_nocache(erombase, BCMA_CORE_SIZE);
452        if (!eromptr)
453            return -ENOMEM;
454    } else {
455        eromptr = bus->mmio;
456    }
457
458    eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32);
459
460    bcma_scan_switch_core(bus, erombase);
461
462    while (eromptr < eromend) {
463        struct bcma_device *other_core;
464        struct bcma_device *core = kzalloc(sizeof(*core), GFP_KERNEL);
465        if (!core) {
466            err = -ENOMEM;
467            goto out;
468        }
469        INIT_LIST_HEAD(&core->list);
470        core->bus = bus;
471
472        err = bcma_get_next_core(bus, &eromptr, NULL, core_num, core);
473        if (err < 0) {
474            kfree(core);
475            if (err == -ENODEV) {
476                core_num++;
477                continue;
478            } else if (err == -ENXIO) {
479                continue;
480            } else if (err == -ESPIPE) {
481                break;
482            }
483            goto out;
484        }
485
486        core->core_index = core_num++;
487        bus->nr_cores++;
488        other_core = bcma_find_core_reverse(bus, core->id.id);
489        core->core_unit = (other_core == NULL) ? 0 : other_core->core_unit + 1;
490
491        bcma_info(bus, "Core %d found: %s (manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
492              core->core_index, bcma_device_name(&core->id),
493              core->id.manuf, core->id.id, core->id.rev,
494              core->id.class);
495
496        list_add_tail(&core->list, &bus->cores);
497    }
498
499    err = 0;
500out:
501    if (bus->hosttype == BCMA_HOSTTYPE_SOC)
502        iounmap(eromptr);
503
504    return err;
505}
506
507int __init bcma_bus_scan_early(struct bcma_bus *bus,
508                   struct bcma_device_id *match,
509                   struct bcma_device *core)
510{
511    u32 erombase;
512    u32 __iomem *eromptr, *eromend;
513
514    int err = -ENODEV;
515    int core_num = 0;
516
517    erombase = bcma_scan_read32(bus, 0, BCMA_CC_EROM);
518    if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
519        eromptr = ioremap_nocache(erombase, BCMA_CORE_SIZE);
520        if (!eromptr)
521            return -ENOMEM;
522    } else {
523        eromptr = bus->mmio;
524    }
525
526    eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32);
527
528    bcma_scan_switch_core(bus, erombase);
529
530    while (eromptr < eromend) {
531        memset(core, 0, sizeof(*core));
532        INIT_LIST_HEAD(&core->list);
533        core->bus = bus;
534
535        err = bcma_get_next_core(bus, &eromptr, match, core_num, core);
536        if (err == -ENODEV) {
537            core_num++;
538            continue;
539        } else if (err == -ENXIO)
540            continue;
541        else if (err == -ESPIPE)
542            break;
543        else if (err < 0)
544            goto out;
545
546        core->core_index = core_num++;
547        bus->nr_cores++;
548        bcma_info(bus, "Core %d found: %s (manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
549              core->core_index, bcma_device_name(&core->id),
550              core->id.manuf, core->id.id, core->id.rev,
551              core->id.class);
552
553        list_add_tail(&core->list, &bus->cores);
554        err = 0;
555        break;
556    }
557
558out:
559    if (bus->hosttype == BCMA_HOSTTYPE_SOC)
560        iounmap(eromptr);
561
562    return err;
563}
564

Archive Download this file

Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master

Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9



interactive